CN106442716B - A kind of composite insulator Inner Defect Testing method - Google Patents
A kind of composite insulator Inner Defect Testing method Download PDFInfo
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- CN106442716B CN106442716B CN201610976452.2A CN201610976452A CN106442716B CN 106442716 B CN106442716 B CN 106442716B CN 201610976452 A CN201610976452 A CN 201610976452A CN 106442716 B CN106442716 B CN 106442716B
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- 239000012212 insulator Substances 0.000 title claims abstract description 62
- 239000002131 composite material Substances 0.000 title claims abstract description 56
- 230000007547 defect Effects 0.000 title claims abstract description 50
- 238000012360 testing method Methods 0.000 title claims abstract description 14
- 238000001514 detection method Methods 0.000 claims abstract description 52
- 150000001875 compounds Chemical class 0.000 claims abstract description 24
- 238000000034 method Methods 0.000 claims abstract description 17
- 239000012535 impurity Substances 0.000 claims abstract description 7
- 230000035945 sensitivity Effects 0.000 claims description 4
- 230000000630 rising effect Effects 0.000 claims description 3
- 230000002950 deficient Effects 0.000 claims description 2
- 230000005540 biological transmission Effects 0.000 description 6
- 230000005684 electric field Effects 0.000 description 4
- 230000005611 electricity Effects 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- 230000006866 deterioration Effects 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 230000032683 aging Effects 0.000 description 1
- 230000003373 anti-fouling effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000002224 dissection Methods 0.000 description 1
- 238000010292 electrical insulation Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000009422 external insulation Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000003325 tomography Methods 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/92—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating breakdown voltage
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- Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
Abstract
The disclosure discloses a kind of composite insulator Inner Defect Testing method, compound inslation subsample is equivalent to a black box by the method, when the defect information inside it can not be directly obtained by appearance, such as internal porosity, internal impurity, plug crack, plug and sheath unsticking etc., high-frequency pulse voltage signal is such as applied to compound inslation subsample by the electrode being connected with compound inslation subsample, and the detection signal of the compound inslation subsample of associated disadvantages is obtained using detecting instruments such as oscillographs, it is handled by the further analysis to detection signal, obtain its waveform parameter and image data base.Detection signal-typical defect type corresponding relationship is established, and in this, as the reference standard for judging testing result.
Description
Technical field
The disclosure belongs to transmission line of electricity external insulation field, in particular to a kind of composite insulator Inner Defect Testing method.
Background technique
Insulator has irreplaceable role in electric system especially transmission line of electricity, and major function includes mechanical solid
Fixed and electric insulation, runnability influence the safe operation of whole transmission line of electricity or even entire electric system.Compound inslation
Many good characteristics such as son has light weight, antifouling work ability is strong, easy to maintain, manufacturing process is simplified.From the 1950s
Since by invention, it has been used widely in the power grid of countries in the world.Currently, what is come into operation in China's electric system is compound exhausted
Edge has had up to ten million, wherein voltage class is alreadyd exceed in the hanging net operation quantity of the composite insulator of 110kV or more
5,000,000, it ranks the first in the world, considerably beyond the deputy U.S..In recent years, the composite insulator of operation partially has been put into
After used a period of time, there is the problems such as deterioration of built-in electrical insulation performance or even whole breakdown, some have even caused
Quality accident causes huge economic losses to electric system.The main reason for causing the accident is the presence of insulator manufacturing process
Problem and composite insulator ageing of performance.
The main problem that composite insulator occurs is that there are sheaths and plug to be detached from, occurs stomata or disconnected inside sheath
The defects of layer, plug slight crack and fracture.Research shows that the field distribution of the composite insulator of existing defects is very uneven, in defect
Apparent electric field distortion will occur in place, will further generate shelf depreciation at electric field distortion, deteriorate composite insulator performance,
Transmission line safety is influenced, interruption of service is caused, brings huge economic losses to electric system.
Summary of the invention
Based on this, the disclosure discloses a kind of composite insulator Inner Defect Testing method, and the method includes following steps
It is rapid:
It the described method comprises the following steps:
S100, using compound inslation subsample as a black box, high-frequency pulse voltage is applied to compound inslation subsample；
S200, the detection letter that the high-frequency pulse voltage signal applied generates on composite insulator is obtained using oscillograph
Number；
S300, the waveform of the waveform of the detection signal of acquisition and composite insulator specific defect type is corresponding, foundation
The corresponding relationship of the specific defect type of signal and composite insulator is detected, it is right further to establish " detection signal-defect type "
According to chart；
S400, high-frequency pulse voltage is applied to composite insulator to be detected, obtains detection signal waveform, according to " detection
Signal-defect type " parallel tables obtain the defect of the composite insulator to be detected.
The beneficial effect of the disclosure is:
It, will aiming at the problem that defect existing for inside the composite insulator used in the transmission line of electricity accurately can not detect to obtain
It is converted into the black box that can not intuitively observe, and applies high-frequency impulse to it, obtains its typical wave feature, establishes compound
The database of the corresponding typical waveform of interior insulator typical defect, as composite insulator Inner Defect Testing judgement according to
According to.The detection method of the composite insulator internal flaw is accurate, reliable.
The composite insulator Inner Defect Testing method is convenient, fast, can be back-calculated to obtain by detection signal compound exhausted
The internal defect type of edge；And without carrying out dissection test to composite insulator, detection error is brought.
Detailed description of the invention:
Fig. 1 is the basic schematic diagram of composite insulator Inner Defect Testing method in an embodiment of the present disclosure；
Fig. 2 (a), Fig. 2 (c), Fig. 2 (e), Fig. 2 (g) are respectively the positive reason of composite insulator in an embodiment of the present disclosure
There are there are voltage, current waveforms that oscillograph in the case of stomata, mandrel fracture measures inside impurity, plug inside condition, plug；
Fig. 2 (b), Fig. 2 (d), Fig. 2 (f), Fig. 2 (h) are respectively the positive reason of composite insulator in an embodiment of the present disclosure
There are there are the amplitude-versus-frequency curves of the electric current in the case of stomata, mandrel fracture inside impurity, plug inside condition, plug.
Specific embodiment:
The disclosure is further detailed in 1- Fig. 2 and specific embodiment with reference to the accompanying drawing；
In one embodiment, a kind of composite insulator Inner Defect Testing method has been come out with, the method includes
Following steps:
It the described method comprises the following steps:
S100, using compound inslation subsample as a black box, high-frequency pulse voltage is applied to compound inslation subsample；
S200, the detection letter that the high-frequency pulse voltage signal applied generates on composite insulator is obtained using oscillograph
Number；
S300, the waveform of the waveform of the detection signal of acquisition and composite insulator specific defect type is corresponding, foundation
The corresponding relationship of the specific defect type of signal and composite insulator is detected, it is right further to establish " detection signal-defect type "
According to chart；
S400, high-frequency pulse voltage is applied to composite insulator to be detected, obtains detection signal waveform, according to " detection
Signal-defect type " parallel tables obtain the defect of the composite insulator to be detected.
In the present embodiment, it by applying high-frequency pulse current to the compound inslation subsample with typical defect, utilizes
The detecting instruments such as oscillograph obtain the detection signal of typical defect sample, establish detection signal-typical defect corresponding relationship, with
This detects the typical defect inside composite insulator as standard.The invention for electric system safe operation and can
It is of great significance by power supply.
Present disclose provides a kind of composite insulator Inner Defect Testing methods, due to typical defect inside composite insulator
Acquisition can not be intuitively observed, composite insulator is then equivalent to a black box, by applying high-frequency impulse to the black box
Electric current, as input quantity.The waveform for the detection signal that oscillograph is obtained is as output quantity.By to the waveform of acquisition carry out into
The processing of one step is extracted the signal characteristics such as its amplitude, frequency, and is summarized using clustering methodology to it, is established compound exhausted
The corresponding relationship of edge internal typical defect and detection signal, establishes the database of detection signal.When to internal flaw
When compound inslation subsample is detected, have the similarity of information by the detection signal and database that compare its output, it is right
Defect existing for inside composite insulator judges.
In one embodiment, the specific defect type of the composite insulator includes: internal porosity, internal impurity, core
Stick crack, plug and sheath unsticking.
In the present embodiment, the main problem that composite insulator occurs is that there are sheaths and plug to be detached from, goes out inside sheath
The defects of existing stomata or tomography, plug slight crack and fracture.Research shows that the field distribution of the composite insulator of existing defects is very
Unevenly, apparent electric field distortion will occur in fault location, and will further generate shelf depreciation at electric field distortion, make compound exhausted
The deterioration of edge performance, influences transmission line safety, causes interruption of service, bring huge economic losses to electric system.
In one embodiment, high-frequency pulse voltage described in step S100 is generated using high frequency pulse generator
's.
In the present embodiment, it is possible to which other equipment for generating high-frequency pulse voltage are applicable in and generate height described in the disclosure
Frequency pulse voltage.
In one embodiment, the method is also used to optimize step S100 medium-high frequency pulse voltage, specifically:
Detection signal in step S200 is compared with composite insulator normal specimens detection signal, obtains the detection signal
Sensitivity, and then obtain the corresponding preferable high-frequency pulse voltage of each defect of composite insulator.
In the present embodiment, the sensitivity of the detection signal refers to defective waveform and amplitude-versus-frequency curve and normal specimens
Waveform and the discrimination of amplitude-versus-frequency curve select the high-frequency pulse voltage used at this time as applying when discrimination maximum
Making alive.
In one embodiment, the waveform for obtaining composite insulator specific defect type described in step S300 specifically wraps
It includes: the shape information that high-frequency pulse voltage is applied to the detection signal obtained after compound inslation subsample is obtained by oscillograph,
The shape information of obtained detection signal is analyzed and handled using clustering methodology and obtains the specific scarce of composite insulator
Fall into the waveform of the corresponding detection signal of type.
In the present embodiment, largely answering with internal typical defect is obtained by manually manufacturing or investigating to collect first
Insulation subsample is closed, classification processing is carried out to it.For the composite insulator with different types of typical internal defect, to it
Apply high-frequency pulse current, as the driving source of black box, is obtained using detecting instruments such as oscillographs and pass through compound inslation increment
The detection signal of product, as shown in figure Fig. 2 (a), Fig. 2 (c), Fig. 2 (e), Fig. 2 (g): being respectively compound in an embodiment of the present disclosure
There are there are the waves that oscillograph in the case of stomata, mandrel fracture measures inside impurity, plug inside insulator normal condition, plug
Shape；The detection signal input computer that the detecting instruments such as oscillograph obtain is further analyzed and is handled in the middle, it is obtained
Relevant parameter attribute.The detection Signals Data Base of typical defect is established based on a large amount of classification experiments.Pass through " clustering
Method " will test the relevant information in Signals Data Base and carry out classification processing, obtain the corresponding relationship of detection signal and defect type.
When engineering carries out the detection of composite insulator internal flaw in practice, the compound inslation subsample that need to be detected is applied
High frequency pulse obtains it and detects signal, if figure Fig. 2 (b), Fig. 2 (d), Fig. 2 (f), Fig. 2 (h) are respectively the disclosure one implementation
Composite insulator normal condition in example, there are there are the amplitude-frequencies in the case of stomata, mandrel fracture inside impurity, plug inside plug
Characteristic curve is further analyzed and handles to detection signal, obtains the wave character of detection signal.Detection letter will be obtained
Number wave character compare, know with the signal in the detection Signals Data Base for the composite insulator internal flaw established before
Not, so that judgement obtains the defect type of tested composite insulator internal flaw.
In one embodiment, the shape information of the detection signal includes: amplitude, rising time and the frequency of waveform
Rate.
In the present embodiment, the shape information refers specifically to the frequency in its width-frequency characteristic and amplitude-versus-frequency curve point
Cloth and its peak value size；Comparison identification is amplitude, rising edge, frequency size and width-frequency characteristic of comparison oscilloscope waveform
The frequency distribution range of curve and its peak value size.
Although being described above in conjunction with embodiment of the attached drawing to the disclosure, the disclosure is not limited to above-mentioned
Specific embodiments and applications field, above-mentioned specific embodiment are only schematical, directiveness, rather than restricted
's.Those skilled in the art under the enlightenment of this specification and are not departing from disclosure scope of the claimed protection
In the case where, a variety of forms can also be made, these belong to the column of disclosure protection.
Claims (5)
1. a kind of composite insulator Inner Defect Testing method, which is characterized in that the described method comprises the following steps:
S100, using compound inslation subsample as a black box, high-frequency pulse voltage is applied to compound inslation subsample；
S200, the detection signal that the high-frequency pulse voltage signal applied generates on composite insulator is obtained using oscillograph；
S300, the waveform of the waveform of the detection signal of acquisition and composite insulator specific defect type is corresponding, foundation detection
The corresponding relationship of signal and composite insulator specific defect type further establishes " detection signal-defect type " parallel tables；
S400, high-frequency pulse voltage is applied to composite insulator to be detected, obtains detection signal waveform, according to " detection signal-
Defect type " parallel tables obtain the defect of the composite insulator to be detected；
The method is also used to optimize step S100 medium-high frequency pulse voltage, specifically: by the detection in step S200
Signal is compared with normal composite insulator sample detector signal, obtains the sensitivity of the detection signal, and then is answered
Close the corresponding preferable high-frequency pulse voltage of each defect of insulator；
The sensitivity of the detection signal refers to the waveform and amplitude-frequency characteristic of defective waveform and amplitude-versus-frequency curve and normal specimens
The discrimination of curve selects the high-frequency pulse voltage used at this time as application voltage when discrimination maximum.
2. the method according to claim 1, wherein the specific defect type of the composite insulator includes: interior
Portion's stomata, internal impurity, plug crack, plug and sheath unsticking.
3. according to the method described in claim 2, it is characterized by: high-frequency pulse voltage described in step S100 is to utilize height
What frequency impulse generator generated.
4. according to the method described in claim 3, it is characterized in that, obtaining composite insulator specific defect described in step S300
The waveform of type specifically includes: obtaining high-frequency pulse voltage by oscillograph and is applied to the detection obtained after compound inslation subsample
The shape information of signal, the shape information of obtained detection signal using clustering methodology is analyzed and is handled obtain it is compound
The waveform of the corresponding detection signal of the specific defect type of insulator.
5. according to the method described in claim 4, it is characterized in that, the shape information of the detection signal includes: the width of waveform
Value, rising time and frequency.
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| CN108198182B (en) * | 2018-01-29 | 2020-11-10 | 广东电网有限责任公司电力科学研究院 | Method and device for evaluating performance of composite insulator mandrel sheath interface |
| CN109194910A (en) * | 2018-08-02 | 2019-01-11 | 中国电力科学研究院有限公司 | A kind of carbon fiber composite core wire production line intelligent video monitoring method and system |
| CN111289570B (en) * | 2020-03-30 | 2021-02-26 | 天津大学 | Component coating debonding nondestructive testing device |
| CN116124903B (en) * | 2023-04-13 | 2023-08-15 | 广东电网有限责任公司揭阳供电局 | Defect early warning method, device, system, equipment and medium for insulator |
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| CN102507731A (en) * | 2011-10-08 | 2012-06-20 | 武汉大学 | Method for detecting composite insulator interface defect |
| CN103149215A (en) * | 2013-02-27 | 2013-06-12 | 中国计量学院 | Method and device for detecting defects of toughened glass insulator |
| CN105044566A (en) * | 2015-06-25 | 2015-11-11 | 国家电网公司 | GIS partial discharge fault detection method based on characteristic ultrahigh frequency signal |
| CN105334269A (en) * | 2015-10-19 | 2016-02-17 | 江苏大学 | Pipeline defect type determination method based on neural network and guided wave characteristic database |
| CN105424802A (en) * | 2015-11-10 | 2016-03-23 | 华南理工大学 | Ultrasonic guided-wave detecting system for defect of composite insulator and detecting method of ultrasonic guided-wave detecting system |
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102507731A (en) * | 2011-10-08 | 2012-06-20 | 武汉大学 | Method for detecting composite insulator interface defect |
| CN103149215A (en) * | 2013-02-27 | 2013-06-12 | 中国计量学院 | Method and device for detecting defects of toughened glass insulator |
| CN105044566A (en) * | 2015-06-25 | 2015-11-11 | 国家电网公司 | GIS partial discharge fault detection method based on characteristic ultrahigh frequency signal |
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Effective date of registration: 20170516 Address after: 710049 Xianning West Road, Shaanxi, China, No. 28, No. Applicant after: Xi'an Jiaotong University Applicant after: China Electric Power Research Institute Address before: 710049 Xianning West Road, Shaanxi, China, No. 28, No. Applicant before: Xi'an Jiaotong University |
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